Three-dimensional (3D) Mn
xCo yNi 1−x–y(OH) 2microspheres were synthesized using a simple hydrothermal method. The structure and morphology of the samples were characterized by x-ray diffraction (XRD), scanning electron microscopy (SEM) and transmission electron microscopy (TEM). The results showed that the Mn xCo yNi 1−x–y(OH) 2compound has the same structure as that of Ni(OH) 2and takes on the morphology of microspheres. The electrochemical properties of the Mn xCo yNi 1−x–y(OH) 2compound were also investigated. It exhibited both high reversible capacity and good cycling performance when cycled at room temperature in a 3.0–0.01 V potential window (versus Li+/Li) at current density of 100 mA g−1. The Mn xCo yNi 1−x–y(OH) 2compound retained a discharge capacity of 575 mAh g−1 after 140 cycles, which suggests that the Mn xCo yNi 1−x–y(OH) 2synthesized by the hydrothermal method can be used as an anode material for the lithium-ion battery.